Bennet woodcroft



UNITED sTATEs PATENT oEEIoE.

BENNET WOODGROFT, OE MANCHESTER, ENGLAND. y

CALICO-PRINTING.

Specication of Letters Patent No'. 5,064, dated April 17, 1847.

T 0 all 'wh-0m t may concern:

Be it known that I, BENNET WooDcRorT, of Manchester, in the county of Lancaster, England, a subject of the Queen of Great Britain, have invented or discovered a new and useful Invention of an Improved Mode of Printing Certain Colors on Calico andv other Fabrics; and I do hereby declare that the followingis a full and exact description thereof.

My invention consists in the-application of an improved gas apparatus to a calico printing machine which apparatus contains the artificial atmosphere or gas deprived or devoid of free oxygen with which the whole room has heretofore been filled in which the operations have been carried on and which apparatus is made to deliver or distribute the said gas on the color used and on the fabric .(while it is being printed with deoxydized'indigo to produce a blue color or with deoxidized indigo combined with other materials to produce othercolors) wherever it is desirable to displace'the atmospheric air I or to prevent its injurious action on the color or fabric without involving the necessity of placing the printing machine thee fabric to be printed the printing materials and the workmen in a room or chamber filled with the artificial air or gas as heretofore pracv tised and I the said BENNET WooDcRoFT do hereby describe the manner in which my said invention is to be performed by the following statement thereof reference being had to the drawing annexed and to the figures and letters marked thereon, that is to say.

Description of the drawing-Figure l, represents a side view in section of an ordinary calico printing machine with one roller for printing one shade/of blue with my improved gas apparatus attached and by which my improved mode of printing with deoxidized indigo and its compound is effected. Fig. 2 represents a front view of parts of the same machine and gas apparatus, Fig. 3 represents in plan a pair of shears of a cleaning doctor with a gas pipe fixed to it through which gas is delivered on to the surface of the color in the color box and also into that portion of the color which is taken up by the cylinder to the doctor. Fig. 4 is a plan of what I call the swinging gas case cut through at the linea in Fig. 2. Fig. 5 represents in plan the lid of the upper part of the gas case. Fig. 6 represents in plan the upper part of the gas case with the lid removed. Fig. 7 a side sectional view of the wholeI gas apparatusonl an enlarged scale. f

Fig. 8 represents a` front -view of Fig.L 7 showing parts of the gas apparatus on a similarly enlarged scale. Figs. 1, 2, 3 5 and 6 are drawn tothe scale on the drawing and Figs. 4, 7, and that size.

Similarguresand letters are Aused; to denote similar. parts throughout the drawing.

8v, are drawnk toa scale double 'y ,I

Z), is the lid of thegas case which i'smade p c is a channel which runs 4around the 4top y of the gas case d containing water in which channel of water the lower partof the lid rests forming a water lute and thereby prevents all contact between the air in the gas case and the external air at any'other point than at the lowest yends `of the case.

f d represents the inside ofthe gas case which has no opening to the external .atmosphere except at the bottom e and mackintosh tube S (in Figs. 7 and 8'). That part of the gas case in which the printed fabric is wound on to it, roller g after being printed is also made of tin strengthened by being united to an outer case of wood. The lower part of f the case which is also made of tin has a large sheet of plate glass f fixed in front through which the printed fabric can be seen a's it is passing upward to be wound on tothe roller c y and in order to preserve the glass free from steam a wide tube of mackintosh vcloth S, depends from the bottom of the glass frame to a point lower than the aperture e in order to 'prevent the escape of the gas and through which tube a stick with a small piece of cloth is introduced to wipe off the steam from the glass from time to time as occasion may'require. The lower part of the case is suspended from two iron rods and eyes and the center part of the case marked 'L' z' between the upper and lower parts of it is made of mackintosh cloth so,y as to act the part of a joint and by its flexibility allow the lowerh part of the case to swing and when not in use to be raised nearly on a level with theV guide roller in order to fbe out of the way of the printer when the machine is wanted to print other colors than those effected by my improved mode.

7c isa gas pipe in communication with a gasometer containing coal gas which gas I prefer and use for my improved gas apparatus.

l isa rod by which the tap is openedV to holes throughA it at the lovver end Whichl holes pass on to a pin fixed to the machine side by which the gas is let into the case and regulated as to quantity.

m and n are two gas pipes by Which gas is passed through the cleaning doctors onto the color to prevent as much as possible the oxidation of the color, but I would observe that IV do not co-nsider it indispensable to have gas introduced at m and n though I think it better to do so. It is in the chamber d Where the absence of free oxygen is of greatest importance in my improved proces s. From this before described arrangement'it will result that if gas be admitted into the gas case d through the pipe 7c until the Whole case be filled and at the same time the cocks of the pipes m and n, be opened and the printing machine set in motion the Winding up of the fabric on the roller g` will as it increases in bulk continue to displace sufficient gas to cause a continuous jet of gas into the angle in front of the nip of the rollers and thus eifectually displace and exclude the atmospheric air therefrom While the gas emitted at the back -of the roller performs the same office there with reference to the color in the color box and the fabric progressing to the nip of the rollers'.

Having thus described the nature of my said invention and the best means I am acquainted with for performing the same I would observe. that other arrangements of printing machinery may be used and that .I do not confine myself to the exact details of the gas-apparatus herein shown and described which may be either attached to or detached. from the printing machine and also that any other suitable artificial atmosphere Which is devoid of or deprived o f free oxygen may be used in place of coal gas for filling the chamber @Z and thereby displacing and excluding atmospheric air during such parts of the process of printing in such colors as aforesaid as'may be desirable. But

That I claim as my invention is Such an application of gas apparatus to calico printing' machinery for producing the colors I have named as Will cause coal gas e or any other suitable gas deprived of ordevoid of free oxygen to be delivered or distributed upon the color and the fabric under operation in manner aforesaid to thel BENNET WooDcRoFT; Witnesses:

JOHN ALcoox LINCOLN, Jos. MARQUETTE.. 

